Paper/Archive/CVE-2026-111641

CVE-2026-111641

fastapiadmin FastapiAdmin — FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 37.6.376 × 207.5 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

FastapiAdmin through 3.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain sessions for any user by abusing unprotected auto-login endpoints. Attackers can list users via /api/v1/auth/auto-login/users, mint a superuser auto-login token, and exchange it for a JWT session to gain full administrative control.

Affected

ProductAffectedFixed inSource

FastapiAdmin≤ 3.0–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

writeuphackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret writeupgithub.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/api/v1/module_system/auth/controller.py#L173-L251 writeupvulncheck.com/advisories/fastapiadmin-through-3.0-authentication-bypass-via-auto-login-endpoints